PYSEC-2026-304

    Dashboard / Vulnerabilities / PYSEC-2026-304

    PYSEC-2026-304

    Published: 29 Jun 2026Last Modified: 1 Jul 2026

    Summary: Server-Side Request Forgery in calibreweb

    Details: calibreweb prior to version 0.6.17 is vulnerable to server-side request forgery (SSRF). This is due to an incomplete fix for [CVE-2022-0339](https://github.com/advisories/GHSA-4w8p-x6g8-fv64). The blacklist does not check for `0.0.0.0`, which would result in a payload of `0.0.0.0` resolving to `localhost`.

    References: https://nvd.nist.gov/vuln/detail/CVE-2022-0766, https://github.com/janeczku/calibre-web/commit/965352c8d96c9eae7a6867ff76b0db137d04b0b8, https://github.com/janeczku/calibre-web, https://huntr.dev/bounties/7f2a5bb4-e6c7-4b6a-b8eb-face9e3add7b, https://pypi.org/project/calibreweb, https://github.com/advisories/GHSA-2647-c639-qv2j

    Affected packages

    Package

    Name: calibreweb

    Purl: pkg:pypi/calibreweb

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.6.17

    Affected versions

    0.6.12
    0.6.13
    0.6.14
    0.6.15
    0.6.16

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High